alf Ari is 65.9 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this K2III star; the first was found in 2010 by radial velocity (Bohyunsan Optical Astronomical Observatory).
Fly there in 3Dalf Ari b takes 380.8 days to go round its star once.
| Spectral type | K2III |
| Surface temperature | 4,553 K |
| Mass | 1.5 solar masses |
| Radius | 13.9 solar radii |
| Luminosity | 85.9 times the Sun |
| Apparent magnitude | 2.00538 |
| Distance from the Sun | 65.9 light-years (20.2 parsecs) |
| Position (J2000) | RA 31.7933°, Dec 23.4624° |
| Constellation | Aries |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| alf Ari b | 380.8 days | 1.200 AU | 13.4 R⊕ estimated | 572.07 M⊕ minimum | Radial Velocity, 2010 |
Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.